This last part of chapter 6 gives us either a ninth vision, or something that was literally carried out but with symbolic significance. Four new arrivals come from Babylon.
Moore believes this is ‘perhaps one crown with two or more parts, such as Christ is represented as wearing, Revelation 19:12, (many crowns or diadems.)’ In verse 14, although the word for crowns is again a plural, the verb used with it is singular.